"Mind the gap" (listen(help·info)) is an audible or visual warning phrase issued to rail passengers to take caution while crossing the horizontal, and in some cases vertical, spatial gap between the train door and the station platform.

The phrase was first introduced in 1969 on the London Underground in the United Kingdom. It is today popularly associated with the UK among tourists because of the particularly British word choice (the verb mind has largely fallen into disuse in the USA).[1]

The phrase "Mind the gap" was coined in around 1968 for a planned automated announcement, after it had become impractical for drivers and station attendants to warn passengers. London Underground chose digital recording using solid state equipment with no moving parts.[2][dubious– discuss] As data storage capacity was expensive, the phrase had to be short. A concise warning was also easier to paint onto the platform.

The equipment was supplied by AEGTelefunken. According to the Independent on Sunday, sound engineer Peter Lodge, who owned Redan Recorders in Bayswater, working with a Scottish Telefunken engineer, recorded an actor reading "Mind the gap" and "Stand clear of the doors please", but the actor insisted on royalties and the phrases had to be re-recorded. Lodge read the phrases to line up the recording equipment for level and those were used.[2]

While Lodge's recording is still in use, some lines use other recordings. One was recorded by voice artist Emma Clarke. Others, on the Piccadilly line for example, are by Tim Bentinck. At least 10 stations were supplied with announcers manufactured by PA Communications Ltd. of Milton Keynes. The recorded voice is that of Keith Wilson, their industrial sales manager at the time (May 1990). It can still be heard, at Paddington for example.

In March 2013 it was reported that an old "Mind the gap" recording by the actor Oswald Laurence would be restored to Embankment station so that the actor's widow could hear his voice.[3]

Because some platforms on the London Underground are curved and the rolling stock that uses them are straight, an unsafe gap is created when a train stops at a curved platform. In the absence of a device to fill the gap, some form of visual and auditory warning is needed to advise passengers of the risk of being caught unaware and sustaining injury by stepping into the gap. The phrase "Mind the gap" was chosen for this purpose and can be found painted along the edges of curved platforms as well as heard on recorded announcements played when a train arrives at many Underground stations.

The recording is also used where platforms are non-standard height. Deep-level tube trains have a floor height around 200 mm (8 inches) less than sub-surface stock trains. Where trains share platforms, for example some Piccadilly line (deep-tube) and District line (sub-surface) stations, the platform is a compromise. On London's Metropolitan line, a gap has been created between the train and the platform edge at Aldgate and Baker Street stations. This is due to the phasing out of the old "A" stock trains and their replacement with "S" stock trains, which have low floors to ease accessibility for disabled people.

"Mind the gap" audible warnings are prominently played on the Central line platforms at Bank, the Northern line northbound platform at Embankment, and the Bakerloo line platforms at Piccadilly Circus. There are markings on the platform edge which usually line up with the doors on the cars.

While the message is often played over the platform's public address system on some lines, it is also becoming more common as an arrival message inside the train itself: "Please mind the gap between the train and the platform".

In Dublin's DART, the phrase "mind the gap" is announced at each station along the line. "Mind the gap" signage is also present at all stations in the city centre. In the rest of Ireland, the message can be seen on some train stations as well. On Commuter and InterCity trains, the announcement "Please mind the gap" is accompanied by the Irish "Seachain an Bhearna le do thoil" when pulling into stations.

The French version, which is an alexandrine, "Attention à la marche en descendant du train" ("Watch your step while getting off the train"), is occasionally written on signs on the platforms in the Paris Métro and can be heard in RER trains. Some newer Métro trains also play this announcement in Italian, English, German, Japanese and Spanish.

In the Athens Metro, the message "Mind the gap between the train and the platform" is heard in both Greek and English at the station of Monastiraki.

In Stockholm's tunnelbana and on Stockholm commuter rail's stations two versions can be heard: "Tänk på avståndet mellan vagn och plattform när Du stiger av", meaning "Mind the distance between carriage and platform when you exit". It is also be displayed as text on electronic displays.

In Hamburg, passengers at the S-Bahn station Berliner Tor are warned with yellow flashing lights and the announcement "Bitte beachten Sie die Lücke zwischen Zug und Bahnsteigkante!" ("Please mind the gap between train and platform").

On the Berlin U-Bahn, the phrase "Bitte beachten Sie beim Aussteigen die Lücke zwischen Zug und Bahnsteigkante" ("Please mind the gap between train and platform edge when alighting") is used, followed by the English "Mind the gap between platform and train."

On the Madrid Metro, a recorded warning message can be heard inside the trains when approaching a station with curved platforms: "Atención: estación en curva. Al salir, tengan cuidado para no introducir el pie entre coche y andén." ("Caution: station on a curve. As you exit, be careful not to place your foot between the train and the platform.") No warning messages are heard when arriving at a station with straight platforms.

On the Lisbon Metro at the Marquês de Pombal station on the blue line, the announcement "Atenção ao intervalo entre o cais e o comboio" ("Pay attention to the gap between the platform and the train") can be heard.

On all of the trains of the Milan Metro network, a yellow sticker on every door is clearly visible with the warning in Italian language “Attenzione allo spazio tra treno e banchina” (meaning literally "Pay attention to the gap between the train and the platform”) and also in English “Mind the gap between the train and the platform”.

In Singapore's MRT, the phrase is used in announcements in English, played in the trains whenever a train approaches an underground station after the station's name has been announced twice. It is also played on underground station platforms just after the train doors open, or sometimes, just as the train approaches the platform. Trains also have stickers pasted on the windows to caution passengers.

The phrase can be heard in New Delhi Metro in two languages (English and Hindi): "(कृपया) दूरी का ध्यान रखें" ("Mind the gap").

Several Chinese metro systems use the phrase extensively; on the Tianjin Metro, stickers on train doors, platforms and announcements mention the gap (as well as to "mind the gap") in both English and Chinese. (The Chinese phrase is 小心站台空隙.) Some Tianjin Metro stations are on slight curves. The Beijing Subway uses "Mind the Gaps" (note the plural). (In the recently opened Line 4, the phrase has gained more prominence, being played in the station every time a train comes in and, in some trains, every time before arriving at a stop.) Both the Shanghai Metro and the Nanjing Metro use versions with slightly mutilated grammar ("Caution, Gap" and "Care the Gap", respectively, although the Chinese is the same).[citation needed]

In Hong Kong's MTR, the phrase "Please mind the gap" (請注意月台空隙) is announced in three languages, namely, Cantonese, English and Putonghua. In recent years, a more elaborate version of the announcement, heard on some East Rail Line stations with very curved platforms, says "Please mind the gap and be aware of the difference in levels between the platform and the train" (請注意空隙及留意月台與車廂地面的高低).

On the Manila Metro Rail Transit System, a pre-recorded message is played at certain stations reminding passengers to "Watch your step and watch the gap between the train and the platform as you get on and off the train". This is simplified in its Filipino translation, which simply reminds passengers to be careful in boarding and alighting the train.

On most Sydney Trains stations, there is an automated announcement reminding passengers to mind the gap as well as posters informing riders about the number of people who fall down the gap each year.

On many trains in Japan, the message "電車とホームの間は広く空いておりますので、ご注意下さい" is spoken. This translates as: "There is a wide space between the train and the platform, so please be careful". The phrase "足元にお気をつけ下さい" is also common, which means "Please mind your step".

Bangkok underground train announcement

In Thailand, the announcement is used a little bit differently from the London one. On Bangkok underground trains and Airport Rail Link trains, it says, "Please mind the gap between train and platform". Some grammarians argue that as specific and countable nouns, the words "train" and "platform" should be preceded by "the". Also, the Thai language version of the announcement does not refer to a "gap" but simply translates to "Please be careful when stepping out of the train". However, in the Bangkok skytrain stations, the Thai announcement mentions the "gap", and can be translated as: "Attention, passengers, while entering and exiting the train, please mind the gap between the platform and the train. Thank you!" The English announcement says: "Attention, please mind the gap between train and platform. Thank you!"

Signs on ferry docks in Shanghai render the phrase in Chinglish as "Note that the level of gap".

Adelaide Metro trains conclude automated station announcements with the reminder "Please mind the gap when alighting from the train".

At the stations of the São Paulo Metro and CPTM in São Paulo, Brazil the sentence that can be heard is "Cuidado com o vão entre o trem e a plataforma" ("Mind the gap between the train and the platform").

At almost all stations of SuperVia, Rio de Janeiro suburban trains, the driver announces "Observe o espaço entre o trem e a plataforma" ("Watch the space between the train and the platform"), and sometimes "Observe o desnível entre o trem e a plataforma" ("Watch the level difference between the train and the platform").

In the Rio de Janeiro Metro, the phrase "Observe atentamente o espaço entre o trem e a plataforma – Mind the gap" also can be heard.

It is also used on the MTA-operated New York City Subway and the Staten Island Railway – on trains and platforms, and in conductor announcements. Newer trains equipped with automated announcements would say "Ladies and gentlemen, as you exit, please be careful of the gap between the platform and the train" where applicable after a station announcement is made.[6][7]

Plaques on Toronto subway and RT station platforms warn riders to "Mind the gap". Announcements about the warning on the public announcement system in each station can also be heard intermittently.

In the United States, the standard Amtrak conductor announcement when approaching any station stop concludes with "Mind the gap between the train and the platform".

On the Buenos Aires Metro, warnings on platform floors and on the door windows in the trains read "Cuidado con el espacio entre el tren y el andén." ("Mind the gap between train and platform").[8]

The phrase was used as the name for a campaign in December 2010 to lobby the UK Government to allow Gap Year students to defer their university place and not pay the higher tuition fees in September 2012.[15]

The Karotz wi-fi rabbit occasionally says "Mind the gap!" at random as part of the "mood" setting.